Java tutorial
import javafx.application.Application; import javafx.beans.value.ObservableValue; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Accordion; import javafx.scene.control.Button; import javafx.scene.control.TitledPane; import javafx.stage.Stage; public class Main extends Application { public static void main(String[] args) { Application.launch(args); } @Override public void start(Stage primaryStage) { Group g = new Group(); Scene scene = new Scene(g, 550, 250); TitledPane t1 = new TitledPane("T1", new Button("B1")); TitledPane t2 = new TitledPane("T2", new Button("B2")); TitledPane t3 = new TitledPane("T3", new Button("B3")); Accordion accordion = new Accordion(); accordion.getPanes().addAll(t1, t2, t3); accordion.expandedPaneProperty() .addListener((ObservableValue<? extends TitledPane> ov, TitledPane old_val, TitledPane new_val) -> { if (new_val != null) { System.out.println(accordion.getExpandedPane().getText()); } }); g.getChildren().add(accordion); primaryStage.setScene(scene); primaryStage.show(); } }